Year	constant 2010 US$
1981	57605010573.5528
1982	41907334423.5156
1983	27759100929.8951
1984	15750595509.5021
1985	17186569129.2307
1986	17314084579.025
1987	11173046233.8152
1988	9574774928.38308
1989	12970297200.7075
1990	18200437932.4533
1991	18085082599.2362
1992	17648102475.0828
1993	20422791179.5233
1994	18210344351.2222
1995	13433797492.3153
1996	15842822426.1135
1997	17241934850.0978
1998	16381595365.8731
1999	15911992612.6761
2000	18608675555.2303
2001	14526281407.6036
2002	17476126875.9398
2003	26225949425.8074
2004	19936202795.1137
2005	17857669591.7444
2006	28447402088.5175
2007	40310900129.0769
2008	40020688226.7229
2009	53926131586.5813
2010	63813637484.1981
2011	58762782106.2157
2012	60737133433.5786
2013	65484666043.4603
2014	73988751466.4201
2015	74210721041.5308
2016	69452265182.5041
2017	68181599978.709